@article{ idzorek2005,
 author = {Thomas M. Idzorek},
 title = {A STEP-BY-STEP GUIDE TO THE BLACK-LITTERMAN MODEL},
 journal={Technical Report},
 year = {2004}
 }
 
 @article{intuition2002,
 author = {Guangliang He, Robert Litterman},
 title = {The Intuition behind Black-Litterman Model Portfolios},
 journal={Investment Management Research, Goldman Sachs Quantitative Resources Group},
 year = {1999}
 }